diff --git a/rd_ui/app/scripts/ng-highchart.js b/rd_ui/app/scripts/ng-highchart.js
index f7d06418c..6a7c31acc 100644
--- a/rd_ui/app/scripts/ng-highchart.js
+++ b/rd_ui/app/scripts/ng-highchart.js
@@ -215,24 +215,26 @@
                         })) {
                             scope.chart.xAxis[0].update({type: 'category'});
 
-                            // We need to make sure that for each category, each series has a value.
-                            var categories = _.union.apply(this, _.map(scope.series, function (s) {
-                                return _.pluck(s.data, 'x')
-                            }));
+                            if (!angular.isDefined(scope.series[0].data[0].name)) {
+                                // We need to make sure that for each category, each series has a value.
+                                var categories = _.union.apply(this, _.map(scope.series, function (s) {
+                                    return _.pluck(s.data, 'x')
+                                }));
 
-                            _.each(scope.series, function (s) {
-                                // TODO: move this logic to Query#getChartData
-                                var yValues = _.groupBy(s.data, 'x');
+                                _.each(scope.series, function (s) {
+                                    // TODO: move this logic to Query#getChartData
+                                    var yValues = _.groupBy(s.data, 'x');
 
-                                var newData = _.sortBy(_.map(categories, function (category) {
-                                    return {
-                                        name: category,
-                                        y: yValues[category] && yValues[category][0].y
-                                    }
-                                }), 'name');
+                                    var newData = _.sortBy(_.map(categories, function (category) {
+                                        return {
+                                            name: category,
+                                            y: yValues[category] && yValues[category][0].y
+                                        }
+                                    }), 'y').reverse();
 
-                                s.data = newData;
-                            });
+                                    s.data = newData;
+                                });
+                            }
                         } else {
                             scope.chart.xAxis[0].update({type: 'datetime'});
                         }